{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["protein", "RNA", "cell type", "cell line", "DNA"], "input": "Using electrophoretic mobility shift assays , we have studied these transcription factors in primary T cells from human blood to verify their presence in a physiologic setting and to identify the signals that stimulate factor activity ."}
{"protein": ["transcription factors"], "RNA": [], "cell type": ["primary T cells"], "cell line": [], "DNA": []}